摘要
针对平煤一矿三水平下延回风上山千米埋深软岩巷道变形量大、围岩整体收缩内敛、变形破坏持续性强的特点,采用理论分析、现场地应力实测等综合研究方法,对影响深井软岩巷道稳定的主控关键指标进行了总结分析,提出了千米深井巷道高强全锚注一体化控制理念。研究表明:三水平下延回风上山围岩变形破坏的主控因素包括:高水平应力、高主应力差、巷道埋深大、围岩松软破碎、巷道跨度效应及原支护方案未能与围岩完全耦合;通过采用高强中空注浆锚杆、高强中空注浆锚索及高强护表组件组合全锚注支护,进行全方位高强耦合控制,实现了锚杆/索锚注一体化、全长锚固及围岩品质增强,现场跟踪监测验证了高强全锚注支护体系适用于千米深井高应力软岩巷道围岩控制,具有较好的推广应用价值。
Aiming at the one kilometer depth of soft rock roadway with the characteristics of large deformation, overall shrinkage and convergence of surrounding rock, strong deformation and failure persistence, through theoretical analysis, in-situ stress measurement and other research methods, key indicators of the main controlling deep soft rock roadway stability were analyzed,and the whole kilometer deep tunnel high-strength bolt-grouting integration control idea is proposed. The research results show that the main controlling factors of deformation and failure of surrounding rock include high horizontal stress, high principal stress difference, large buried depth of roadway, loose and broken surrounding rock, roadway span effect and the original support scheme failed to fully couple with surrounding rock mass; by adopting the combination of high strength hollow grouting bolt, high strength hollow grouting anchor cable and high strength surface protection components, the full anchor grouting support is carried out for the omni-directional high strength coupling control and the integration of anchor rod/cable anchorage, full-length anchoring and surrounding rock quality enhancement. Field tracking and monitoring have verified that the high strength full anchor grouting support system is suitable for surrounding rock control of high stress soft rock roadway in kilometer depth wells, and has a good value of extension and application.
作者
魏夕合
王平
翟潘
蒋敬平
WEI Xihe;WANG Ping;ZHAI Pan;JIANG Jingping(Shandong Huayu University of Technology,Dezhou 253034,China;Jinan Aoke Mining Engineering Technology Co.,Ltd.,Ji＇nan 250031,China)
出处
《煤矿安全》
CAS
北大核心
2018年第11期69-72,共4页
Safety in Coal Mines
关键词
深井软岩
变形破坏
主控指标
高强全锚注
巷道失稳
deep soft rock
deformation and failure
main control index
high strength full bolt-grouting
roadway instability
